Hidden Access Criteria Based Personal Health Record in Cloud through Random Key Generation

Cloud has becoming an emerging and mandatory technology in every field because of its wide applications. Similarly we can access our file from anywhere and at any time without any limitation the only resource we need is internet connectivity. With the developing technology most of data are stored in cloud and the major issue faced here is security. Here patient health record is the data going to be stored and shared in secure way in cloud. Primarily PHR will be uploaded by user in secure way through encryption process with access rights. User who satisfies access policy can download the file in cipher text format. To access the file user should have particular file key and this key will be valid for single time access. Hence the possibility of accessing same file with same key more than one time is impossible. To attain most efficient security RC4 encryption is implemented in our proposed work. Our result shows the proposed work achieves better results compared to other existing system.